sdseasydyn

sdseasydyn is a small, CLI-first Dynamic DNS updater for the EasyDNS service.

It is designed to be safe for cron usage, avoid unnecessary updates, and behave predictably under transient network conditions.

The project is implemented in modern Perl and is distributed on CPAN as App::sdseasydyn.

Features

• Simple CLI interface (sdseasydyn update)
• Clear configuration precedence: CLI > environment > config file > defaults
• Secure handling of credentials (tokens are never logged)
• Public IPv4 discovery with configurable endpoint
• Local state file to avoid redundant updates
• Bounded retry logic using Retry::Policy
• Suitable for unattended / scheduled execution

Quick start

sdseasydyn update --host example.easydns.net

Credentials are provided via environment variables:

export EASYDNS_USER=your_username export EASYDNS_TOKEN=your_token

See docs/EASYDNS.md and docs/HOWTO.md for full configuration details.

Relationship to EasyDNS

This project is an independent, community-maintained tool and is not affiliated with, endorsed by, or officially supported by EasyDNS Technologies.

It uses the publicly documented EasyDNS Dynamic DNS update endpoint and is provided as-is under the terms of its open-source license.

Documentation

• docs/EASYDNS.md — EasyDNS-specific behavior and notes
• docs/HOWTO.md — usage and configuration guide
• SECURITY.md — security considerations

License

This project is licensed under the GNU Lesser General Public License version 2.1 (LGPL-2.1). See the LICENSE file for details.

Author

Sergio de Sousa
sergio@serso.com